The 'Who Owns My Heart' warbler showed up to mentor contestant Lauren Alaina, who had previously sung a version of Joe McElderry's 'The Climb'.
Alaina let the cat out of the bag yesterday when she tweeted "I got to meet @MileyCyrus and she was so classy and genuine".
Classy and genuine: or as we like to call them, Jedward.
Cyrus offered advice to all of the remaining contestants in the shape of this slightly downbeat soundbite: "The most important thing you can do is just do it for yourself, because you will always have mean comments. They will always talk about you — always — and that's never gonna change."